2 — מטקסט JSON לאובייקטי Java

 }
 
 dependencies {
+    implementation("com.google.code.gson:gson:2.14.0")
     implementation("com.android.volley:volley:1.2.1")
     implementation(libs.activity.ktx)
     implementation(libs.appcompat)

                     android:fontFamily="monospace"
                     android:textIsSelectable="true" />
             </androidx.core.widget.NestedScrollView>
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="12dp"
+                android:text="JSON to deserialize — edit or paste from Notepad++"
+                android:textStyle="bold" />
+            <Button
+                android:id="@+id/loadDemo"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="Load demo JSON" />
+            <EditText
+                android:id="@+id/jsonInput"
+                android:layout_width="match_parent"
+                android:layout_height="180dp"
+                android:gravity="top|start"
+                android:fontFamily="monospace"
+                android:inputType="textMultiLine|textNoSuggestions"
+                android:hint="Paste a JSON array here"
+                android:importantForAutofill="no" />
+            <Button
+                android:id="@+id/parsePets"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="Deserialize to Pet[]" />
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="Java objects — table built from Pet fields"
+                android:textStyle="bold" />
+            <TextView
+                android:id="@+id/objectStatus"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:accessibilityLiveRegion="polite"
+                android:text="No objects yet" />
+            <HorizontalScrollView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:fillViewport="true">
+                <TableLayout
+                    android:id="@+id/petTable"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:stretchColumns="1" />
+            </HorizontalScrollView>
         </LinearLayout>
     </androidx.core.widget.NestedScrollView>
 </androidx.constraintlayout.widget.ConstraintLayout>

 package com.example.topic;
 
 import android.os.Bundle;
+import android.widget.TableRow;
+import android.widget.TextView;
 
 import androidx.activity.EdgeToEdge;
 import androidx.appcompat.app.AppCompatActivity;

 import com.android.volley.toolbox.Volley;
 import com.example.topic.databinding.ActivityMainBinding;
 
+import com.google.gson.Gson;
+import com.google.gson.JsonParseException;
+
 import java.util.Collections;
+import java.util.Scanner;
 import java.util.Map;
 
 public class MainActivity extends AppCompatActivity {

     private ActivityMainBinding binding;
     private RequestQueue queue;
     private int httpStatus;
+    private final Gson gson = new Gson();
+    private Pet[] pets = new Pet[0];
 
     /** Creates the screen and connects its network action. */
     @Override

         });
         queue = Volley.newRequestQueue(getApplicationContext());
         binding.getPets.setOnClickListener(v -> getPets());
+        binding.loadDemo.setOnClickListener(v -> loadDemo());
+        binding.parsePets.setOnClickListener(v -> parsePets());
     }
 
     /** Fetches JSON as text; no Java Pet objects are created here. */

         StringRequest request = new StringRequest(Request.Method.GET,
                 BASE_URL + "/pet/findByStatus?status=available", text -> {
             binding.responseJson.setText(text);
+            binding.jsonInput.setText(text);
             binding.status.setText("GET HTTP " + httpStatus);
         }, this::showError) {
             @Override

         request.setShouldCache(false);
         request.setTag(this);
         queue.add(request);
+    }
+
+    /** Loads editable, predictable JSON without changing the last HTTP response. */
+    private void loadDemo() {
+        try (Scanner scanner = new Scanner(getResources().openRawResource(R.raw.pets), "UTF-8")) {
+            binding.jsonInput.setText(scanner.useDelimiter("\\A").next());
+        }
+    }
+
+    /** Reconstructs objects from text, then builds a table from their fields. */
+    private void parsePets() {
+        try {
+            String jsonText = binding.jsonInput.getText().toString();
+            Pet[] parsed = gson.fromJson(jsonText, Pet[].class);
+            if (parsed == null) throw new JsonParseException("Expected an array, not null");
+            for (Pet pet : parsed) {
+                if (pet == null) throw new JsonParseException("A pet cannot be null");
+            }
+            pets = parsed;
+            renderPets(pets);
+        } catch (JsonParseException error) {
+            pets = new Pet[0];
+            renderPets(pets);
+            binding.objectStatus.setText("Cannot deserialize: " + error.getMessage());
+        }
+    }
+
+    /** Displays object fields; this method never reads or parses JSON. */
+    private void renderPets(Pet[] animals) {
+        binding.petTable.removeAllViews();
+        addRow("ID", "Name", "Status");
+        for (Pet pet : animals) {
+            addRow(String.valueOf(pet.id), pet.name, pet.status);
+        }
+        binding.objectStatus.setText(animals.length + " animal objects shown");
+    }
+
+    /** Adds one table row with three ordinary text cells. */
+    private void addRow(String id, String name, String status) {
+        TableRow row = new TableRow(this);
+        for (String value : new String[]{id, name, status}) {
+            TextView cell = new TextView(this);
+            cell.setText(String.valueOf(value));
+            cell.setPadding(12, 8, 12, 8);
+            row.addView(cell);
+        }
+        binding.petTable.addView(row);
     }
 
     /** Keeps HTTP error bodies visible and distinguishes them from connection failures. */